ZKE Solutions Newsletter

PhD economist, 20 years building financial models across energy, mortgage, and finance. I build investor-ready deliverables: scenario modeling with controlled inputs, sensitivity analysis, audit-safe outputs that survive scrutiny.

economics

Feb 7, 2026

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21 min read

The Memory Wall

SanDisk's $85 Billion Bet That Flash Is the New DRAM

Ziya Esrefoglu

economics

Food Delivery Prices Are Rising in DC. Here's What the Data Shows

Feb 6, 2026

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4 min read

Food Delivery Prices Are Rising in DC. Here's What the Data Shows

Introducing the Food Delivery Index -- a daily, research-grade price tracker for UberEats and DoorDash.

Ziya Esrefoglu

economics

Feb 5, 2026

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2 min read

DoorDash vs UberEats

No Price Difference in DC

Ziya Esrefoglu

economics

The Rare Earth Paradox: Why America's Critical Minerals Strategy Needs a Reboot

Feb 3, 2026

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28 min read

The Rare Earth Paradox: Why America's Critical Minerals Strategy Needs a Reboot

The path to supply chain independence runs through innovation labs and recycling plants, not just mines and territorial acquisitions

Ziya Esrefoglu